Shape-induced frustration of hexagonal order in polyhedral colloids

Roel P.A. Dullens, Maurice C.D. Mourad, Dirk G.A.L. Aarts, J.P. Hoogenboom, Willem K. Kegel

Research output: Contribution to journalArticleAcademicpeer-review

28 Citations (Scopus)
45 Downloads (Pure)

Abstract

The effect of a nonspherical particle shape and shape polydispersity on the structure of densely packed hard colloidal particles was studied in real space by confocal microscopy. We show that the first layer at the wall of concentrated size-monodisperse but shape-polydisperse polyhedral colloids exhibits significant deviations from a hexagonal lattice. These deviations are identified as bond-orientational fluctuations which lead to percolating “mismatch lines.” While the shape-induced geometrical frustration of the hexagonal symmetry suppresses translational order, bond-orientational order is clearly retained, indicating a hexaticlike structure of the polyhedral colloids
Original languageEnglish
Pages (from-to)028304-1-028304-4
Number of pages4
JournalPhysical review letters
Volume96
Issue number2
DOIs
Publication statusPublished - 2006

Keywords

  • IR-74134
  • METIS-232150

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